8
Connecting to a
GPS Unit
The data logger function must be enabled using the Field
Scout software in order to record a GPS signal (see Meter
Settings p. 16).
The GPS unit must be plugged into the TCM500 meter
and working when the meter is first turned on. If a GPS
signal is found at startup, the logger will search for a GPS
signal for every reading. If no GPS signal is found when
the meter is first turned on, the meter will not search for
one when taking readings, thereby saving time when
taking readings. In this case the LCD will display the
No
GPS Found
message.
If the GPS signal is found while taking geo-referenced
readings, the LCD will briefly display the message,
“
Reading GPS ..
” before displaying the measurement. If
the GPS signal is lost during a series of readings, or if the
specified differential correction is not found, the LCD will
read “
Reading GPS .. ERR
” before returning to
measurement mode. In this case, the data will be recorded
without latitude and longitude. During subsequent
readings, the meter will again search for a GPS.
GPS Setting
Your GPS unit must be set for NMEA 0183 input/output
messages. If the meter has trouble receiving the GPS
signal, check that the GPS unit has the following settings:
Data bits: 8
Stop bits: 1
Baud rate: 4800 bps
Parity: None
Timing: 1 second
GGA data string
